need advice with creating table template

Hello, i have some data in my DB structure like: Company name, product class (2 of them for example balls, shoes) and product type... each of class divided by many of types. For example balls can be divided by 3 types(tennis, football,basketball) shoes type example can be (Sneakers,gumshoes,boots, high boots,ballerina, etc.). Now i have report that display data only by class smth like



But i want to make it looks like



Could you help me to understand how i need to send data to birt report and how i need organize template for it?